JPS57177074A - Magnetic coating material for magnetic recording medium and its preparation - Google Patents
Magnetic coating material for magnetic recording medium and its preparationInfo
- Publication number
- JPS57177074A JPS57177074A JP6139281A JP6139281A JPS57177074A JP S57177074 A JPS57177074 A JP S57177074A JP 6139281 A JP6139281 A JP 6139281A JP 6139281 A JP6139281 A JP 6139281A JP S57177074 A JPS57177074 A JP S57177074A
- Authority
- JP
- Japan
- Prior art keywords
- coating material
- magnetic
- lecithin
- recording medium
- magnetic coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: A magnetic coating material, prepared by incorporating lecithin and a cationic surfactant as a dispersing agent in a ferromagnetic powder and a resin binder, having little flocculates and stable dispersion state, and capable of giving a magnetic recording medium having improved record reproduction characteristics.
CONSTITUTION: Lecithin, preferably soybean oil lecithin, is adsorbed in ferromagnetic powder, preferably γ-Fe2O3 or Fe3O4 containing Co, and a cationic surfactant, preferably an amine salt, is then adsorbed thereon, and then mixed and dispersed in a resin binder, preferably vinyl chloride-vinyl acetate copolymer, to give the aimed magnetic coating material.
USE: A high-density recording for audio, video or computers.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6139281A JPS57177074A (en) | 1981-04-24 | 1981-04-24 | Magnetic coating material for magnetic recording medium and its preparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6139281A JPS57177074A (en) | 1981-04-24 | 1981-04-24 | Magnetic coating material for magnetic recording medium and its preparation |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57177074A true JPS57177074A (en) | 1982-10-30 |
Family
ID=13169839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6139281A Pending JPS57177074A (en) | 1981-04-24 | 1981-04-24 | Magnetic coating material for magnetic recording medium and its preparation |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57177074A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61274737A (en) * | 1985-05-21 | 1986-12-04 | フエロフルイデイクス・コ−ポレイシヨン | Stable ferro-fluid composition and its production and use |
-
1981
- 1981-04-24 JP JP6139281A patent/JPS57177074A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61274737A (en) * | 1985-05-21 | 1986-12-04 | フエロフルイデイクス・コ−ポレイシヨン | Stable ferro-fluid composition and its production and use |
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